E. 1999 Eternal is the second studio album by American hip hop group Bone Thugs-N-Harmony, released July 25, 1995, on Ruthless Records. The album was released four months after the death of rapper Eazy-E, the group's mentor and the executive producer of the album. Both the album and single "Tha Crossroads" are dedicated to him. Following up on the surprise success of their breakthrough single "Thuggish Ruggish Bone", it became a popular album and received positive reviews from music critics, earning praise for the group's melodic rapping style. The album title is a portmanteau of the then-future year 1999 and Cleveland's eastside neighborhood centering around East 99th Street and St. Clair Avenue where the group is based from.

Critical reviews of E. 1999 Eternal. Jason Birchmeier of Allmusic described it as "an impressive debut full-length that dismisses any notion that the group was merely a one-hit wonder" and claims that it "maintains a consistent tone, one that's menacing and somber, produced entirely by DJ U-Neek, a Los Angeles-based producer who frames the songs with dark, smoked-out G-funk beats and synth melodies." The Source hailed it The Top 100 Rap Albums of 1990s which was met with a 4 1/2 mic rating.[2]